Practice problems across 75+ categories
Practice problems frequently asked at Google • 3407 problems | 851 Easy | 1775 Medium | 761 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 181 | Binary Tree Zigzag Level Order Traversal | Medium | TreeBreadth-First SearchBinary Tree |
| 182 | Binary Trees With Factors | Medium | ArrayHash TableDynamic Programming |
| 183 | Binary Watch | Easy | BacktrackingBit Manipulation |
| 184 | Bind Function to Context | Medium | JavaScript |
| 185 | Bitwise AND of Numbers Range | Medium | Bit Manipulation |
| 186 | Bitwise OR of Adjacent Elements | Easy | ArrayBit Manipulation |
| 187 | Bitwise OR of All Subsequence Sums | Medium | ArrayMathBit Manipulation |
| 188 | Bitwise ORs of Subarrays | Medium | ArrayDynamic ProgrammingBit Manipulation |
| 189 | Bitwise User Permissions Analysis | Medium | Database |
| 190 | Bitwise XOR of All Pairings | Medium | ArrayBit ManipulationBrainteaser |
| 191 | Block Placement Queries | Hard | ArrayBinary SearchBinary Indexed Tree |
| 192 | Boats to Save People | Medium | ArrayTwo PointersGreedy |
| 193 | Bold Words in String | Medium | ArrayHash TableString |
| 194 | Books with NULL Ratings | Easy | Database |
| 195 | Boundary of Binary Tree | Medium | TreeDepth-First SearchBinary Tree |
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